Rare ‘Mellon Blue’ diamond expected to fetch up to $30 million at auction

9 novembre 2025
Geneva’s November auctions will showcase the 9.51-carat “Mellon Blue” diamond, a Fancy Vivid Blue gem valued at up to $30 million, alongside the Glowing Rose pink diamond and historic jewels once owned by Napoleon.
 Site référencé:  Euronews

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